Attempting to press "Start" on the Monstrous Research to turn in 1 Shard (Light Shard in my case) for 20 Prestige currently gives me, "An unexpected error occurred on the server."
Attempting to press "Start" on the Monstrous Research to turn in 1 Shard (Light Shard in my case) for 20 Prestige currently gives me, "An unexpected error occurred on the server."
I can confirm that it occurs for any Monstrous Research prestige mission. I had three and they all give me "An unexpected error occurred on the server." when I try to start them